Finding the Fourth Proportional to 812,374.64, 1,120,724.05 and 489,905.54
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Solution
The fourth proportional to 812,374.64, 1,120,724.05 and 489,905.54 is: 675,856.80
Step by Step Solution
- Step 1: Write the proportion equation
812,374.64 : 1,120,724.05 = 489,905.54 : x - Step 2: Convert to fraction form
812,374.64/1,120,724.05 = 489,905.54/x - Step 3: Cross multiply
812,374.64x = 1,120,724.05 × 489,905.54 - Step 4: Simplify right side
812,374.64x = 549,048,920,906.24 - Step 5: Solve for x
x = 549,048,920,906.24/812,374.64 - Step 6: Final answer
x = 675,856.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.